SAN ANTONIO (EGMN) - Analysis of more than 1,100 breast cancer patients in a phase III clinical trial suggests that axillary node dissection after a positive sentinel node biopsy might be unnecessary in women who have only a single positive node and very small tumors with no lymphovascular involvement."Although in the majority of patients with positive sentinel nodes, an axillary node dissection is considered necessary, a completion dissection might be avoided in these patients with a combination...